Xerox Phaser 8400 Service Manual page 29

Service Parts Disassembly
8-12
7. Remove Left and Right Printhead Restraints. First remove the screw, then
pull inward towards the Printhead, then lift up and slightly toward the rear
to remove.
Printhead Restraint
Note
Adjust Printhead position as required to remove the right restraint.
8. Remove the Roll Block on the left end of the Printhead shaft.
Caution
The Roll Block may be hot if the printer was just shut down.
Phaser 8400/8500/8550/8560 Color Printer Service Manual
Printhead Restraint
When reassembling,
torque to 6 in/lbs (1 N-m)
Printhead Shaft
Roll Block
s8500-075
s8500-076